The Phelps Lake Loop in Grand Teton National Park is a 7.2-mile hike that offers stunning views of the glacial lake and surrounding mountains. It's also a super popular place to cliff jump - and the only place that I know of where you can cliff jump in the Tetons:) cliff jumping isn't really my thing, so we did other things instead, but I've heard this is a lot of fun and a very pretty hike!